The Systematic Development of X Ray Plates And Films
The book The Systematic Development of X Ray Plates And Films was written by author Lehman Wendell Here you can read free online of The Systematic Development of X Ray Plates And Films book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The Systematic Development of X Ray Plates And Films a good or bad book?
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Heat increases the chemical action and cold retards, so it is obvious that for uniform results the developer should always be kept at a certain definite temperature. Experience has proved that most develop- ing agents work best at a temperature of 65 F. A cold developer will produce thin negatives, lacking in detail, whereas a warm developer will produce a heavy, flat quality without proper gradation. Hydrochinon prac- tically ceases to work below 60 F. The simplest way to maintain a uniform te...mperature has already been described in the paragraph dealing with the ' ' unit ' ' system of tank manipulation. Water of the proper temperature is allowed to circulate freely around the tanks at all times, the temperature of the water being controlled by combination hot and cold water faucets. During the summer months the cold tap water will often be found at the correct temperature, but where this condition does not obtain ice should be added. The ideal method of maintaining a uniform tempera- ture is to employ a so-called "constant temperature 58 DEVELOPMENT OF X-EAY PLATES AND FILMS bath.
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